/*
 * FindBugs - Find Bugs in Java programs
 * Copyright (C) 2003-2008 University of Maryland
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package edu.umd.cs.findbugs.cloud.db;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import edu.umd.cs.findbugs.util.Util;

/**
 * @author pugh
 */
public final class IPAddressLookup {

	volatile String ipAddress = "unknown";

	CountDownLatch latch = new CountDownLatch(1);

	IPAddressLookup() {
		Thread t = new Thread(new Runnable() {

			public void run() {
				BufferedReader in = null;
				try {
					URL u = new URL("http://www.whatismyip.org/");
					URLConnection c = u.openConnection();
					
					
					 in = new BufferedReader(new InputStreamReader(c.getInputStream()));
					ipAddress = in.readLine();
					
				} catch (IOException e) {
					assert true;
				} finally {

					latch.countDown();
					Util.closeSilently(in);
				}

			}
		});
		t.setDaemon(true);
		t.start();
	}

	public String get() {
		try {
			latch.await(100, TimeUnit.MILLISECONDS);
		} catch (InterruptedException e) {
			assert true;
		}
		return ipAddress;
	}

}
